The steps Thomas used to solve an equation are shown. Given: 10 – 2 (x - 1) = 8
Step 1: 8(x - 1) = 8
Step 2: % -1=1
Step 3: x = 2
Which statement about the steps Thomas used is true?
A. Thomas's steps are all correct.
B. There is an error in Step 1.
C. There is an error in Step 3.
D. There is an error in Step 2.

560

hope this : )

the square root of what number? if you add that, then someone will probably answer the question.

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15